热管散热装置对车用锂离子电池组内温度分布影响数值模拟

doi:10.11949/j.issn.0438-1157.20161404

化工学报 ›› 2016, Vol. 67 ›› Issue (S2): 340-347.DOI: 10.11949/j.issn.0438-1157.20161404

热管散热装置对车用锂离子电池组内温度分布影响数值模拟

王建¹, 郭航^1,2, 叶芳¹, 马重芳¹

1. 北京工业大学环境与能源工程学院, 传热强化与过程节能教育部重点实验室, 传热与能源利用北京市重点实验室, 北京 100124;
2. 北京电动车辆协同创新中心, 北京 100081

收稿日期:2016-10-08 修回日期:2016-10-21 出版日期:2016-12-30 发布日期:2016-12-30
通讯作者: 郭航
基金资助:
北京电动车辆协同创新中心项目。

Numerical simulation of effect of heat pipe cooling device on temperature distribution in lithium-ion battery pack of vehicle

WANG Jian¹, GUO Hang^1,2, YE Fang¹, MA Chongfang¹

1. MOE Key Laboratory of Enhanced Heat Transfer Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China;
2. Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing 100081, China

Received:2016-10-08 Revised:2016-10-21 Online:2016-12-30 Published:2016-12-30
Supported by:
supported by the Collaborative Innovation Center of Electric Vehicles in Beijing.

摘要/Abstract

摘要：

电动汽车锂离子电池温度过高会降低电池的放电效率，加速电池寿命的衰减。为了降低电池组温度，设计了热管内插于电池组的散热系统。以电动汽车实际行驶过程中的速度为依据，对不同放电电流下电池组的温度场分布进行了数值计算。结果表明：随着车速的提高，电池的放电电流、产热量急剧增加，当车速达到120 km·h^-1时，放电电流高达143 A，电池放电截止时，电池组温度达到56℃；与自然对流冷却方式相比，热管冷却可以将电池组的平均温度降低4.6℃，电池组温差降低2.2℃；热管冷凝段长度的增长可以有效地降低电池组的温度，热管冷凝段长度为50 mm时，可以基本上满足电池组的散热需求。

关键词: 锂离子电池, 热管, 数值模拟, 温度场

Abstract:

Too high temperature of a lithium-ion battery pack will reduce the discharge efficiency and accelerate the decay of battery life.In order to lower the temperature of the battery pack,a cooling system which inserted heat pipes among the batteries was designed.Based on the actual speed of electric vehicle,the temperature distribution of the battery pack under different speeds was numerically calculated.The results showed that the discharge current and the heat production increased sharply with the increase of vehicle speed,the discharge current reached up to 143 A at a vehicle speed of 120 km·h^-1,and the battery pack temperature exceeded 50℃ when the batteries discharged ending.Compared with the natural convection cooling system,the heat pipe cooling system made the average temperature of the battery pack reduce 4.6℃ and the temperature difference reduce 2.2℃.The temperature of battery pack was effectively reduced with the increase in length of condensation section of heat pipes.A satisfactory cooling requirement of the battery pack was obtained when the length of heat pipe condensing section was 50 mm.

Key words: lithium-ion batteries, heat pipes, numerical simulation, temperature field

中图分类号:

TM911.1

王建, 郭航, 叶芳, 马重芳. 热管散热装置对车用锂离子电池组内温度分布影响数值模拟[J]. 化工学报, 2016, 67(S2): 340-347.

WANG Jian, GUO Hang, YE Fang, MA Chongfang. Numerical simulation of effect of heat pipe cooling device on temperature distribution in lithium-ion battery pack of vehicle[J]. CIESC Journal, 2016, 67(S2): 340-347.

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热管散热装置对车用锂离子电池组内温度分布影响数值模拟

Numerical simulation of effect of heat pipe cooling device on temperature distribution in lithium-ion battery pack of vehicle

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